NAPA — The Raiders worked out veteran offensive lineman Andre Gurode on Friday.

Gurode, 34, started 127 games for the Dallas Cowboys and Baltimore Ravens from 2002-11. He signed with the Chicago Bears in 2012 but didn't play any regular-season games.

Gurode played center for the Cowboys, but he converted to guard with the Ravens in 2011. He is a five-time Pro Bowler.

The Raiders are set at center with third-year player Stefen Wisniewski. However, Wisniewski started at left guard his rookie season, so he is versatile enough to move back if needed.

For now, the Raiders are looking at Tony Bergstrom and Lucas Nix at left guard. Neither player has started a game at left guard in the NFL. Bergstrom started one game his rookie season, at right guard.

Gurode worked out in front of 20 or so coaches, scouts and trainers. Head coach Dennis Allen and general manager Reggie McKenzie were among those who watched as Gurode went through the paces after the Raiders concluded their first practice of training camp.